President Barack Obama arrives by motorcade for the Senate Democratic Retreat in Baltimore, Md., Jan. 15, 2015.

President Barack Obama arrives by motorcade for the Senate Democratic Retreat in Baltimore, Md., Jan. 15, 2015.

President Barack Obama looks at a selfie taken with restaurant staff at Charmington’s cafe in North Baltimore, Md., Jan. 15, 2015.

President Barack Obama looks at a selfie taken with restaurant staff at Charmington’s cafe in North Baltimore, Md., Jan. 15, 2015.

President Barack Obama greets patrons at Charmington’s cafe in North Baltimore, Md., Jan. 15, 2015.

President Barack Obama greets patrons at Charmington’s cafe in North Baltimore, Md., Jan. 15, 2015.

President Barack Obama views the original manuscript of "The Star-Spangled Banner" during his tour of the Fort McHenry Visitor and Education Center in Baltimore, Md., Sept. 12, 2014. With the President are Vince Vaise, National Parks Service Ranger and Chief of Interpretation at Fort McHenry, and Maryland elected officials.

President Barack Obama views the original manuscript of  "The Star-Spangled Banner" during his tour of the Fort McHenry Visitor and Education Center in Baltimore, Md., Sept. 12, 2014. With the President are Vince Vaise,  National Parks Service Ranger and Chief of Interpretation at Fort McHenry, and Maryland elected officials.

President Barack Obama visits a pre-kindergarten classroom at Moravia Elementary School in Baltimore, Md., May 17, 2013.

President Barack Obama visits a pre-kindergarten classroom at Moravia Elementary School in Baltimore, Md., May 17, 2013.

President Barack Obama participates in a literacy lesson with students while visiting a pre-kindergarten classroom at Moravia Elementary School in Baltimore, Md., May 17, 2013.

President Barack Obama participates in a literacy lesson with students while visiting a pre-kindergarten classroom at Moravia Elementary School in Baltimore, Md., May 17, 2013.

President Barack Obama bows his head during the invocation at the nationally televised Republican House Issues Conference in Baltimore, Md., Jan. 29, 2010. Standing with the President on-stage, from left, are Rep. John Boehner, R-Ohio, Rep. Eric Cantor, R-Va., and Rep. Mike Pence, R-Ind.

President Barack Obama bows his head during the invocation at the nationally televised Republican House Issues Conference  in Baltimore, Md., Jan. 29, 2010. Standing with the President on-stage, from left, are Rep. John Boehner, R-Ohio, Rep. Eric Cantor, R-Va., and Rep. Mike Pence, R-Ind.

Transportation Secretary Ray LaHood, a Republican member of the Cabinet, feigns being a blocking back for President Barack Obama as he arrives backstage to meet with GOP House leaders before speaking to their issues conference at the Renaissance Baltimore Harbor Place Hotel in Baltimore, Md., Jan. 29, 2010.

Transportation Secretary Ray LaHood, a Republican member of the Cabinet, feigns being a blocking back for President Barack Obama as he arrives backstage to meet with GOP House leaders before speaking to their issues conference at the Renaissance Baltimore Harbor Place Hotel in Baltimore, Md., Jan. 29, 2010.